.skeleton {
    content: ' ';
    cursor: progress;
    border-radius: 2px;
    background: linear-gradient(90deg, #ddda 40%, #efefefaa, #ddda 60%) right / 300% 100%;
    animation: skeleton-loading 1s linear infinite;
}

@keyframes skeleton-loading {
    to {
        background-position: left;
    }
}